CN202216231U - High-dryness steam injection boiler - Google Patents
High-dryness steam injection boiler Download PDFInfo
- Publication number
- CN202216231U CN202216231U CN2011202553716U CN201120255371U CN202216231U CN 202216231 U CN202216231 U CN 202216231U CN 2011202553716 U CN2011202553716 U CN 2011202553716U CN 201120255371 U CN201120255371 U CN 201120255371U CN 202216231 U CN202216231 U CN 202216231U
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- water
- section tube
- tube bank
- tube bundle
- heat exchanger
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Abstract
The utility model relates to a high-dryness steam injection boiler which has the technical scheme of comprising a burner, a water-water heat exchanger, a convection section tube bundle, a transition section, a radiation section tube bundle, a separator and an atomization pipeline, wherein the convection section tube bundle and the radiation section tube bundle are arranged in a closed space; one end of the water-water heat exchanger is communicated with the convection section tube bundle, and the other end of the water-water heat exchanger is communicated with the radiation section tube bundle; a water inlet pipeline of the convection section tube bundle is injected into an oil well through the water-water heat exchanger, and a water outlet pipeline of the convection section tube bundle is injected into the oil well through the water-water heat exchanger, the radiation section tube bundle and the separator; a water outlet end of the radiation section tube bundle is connected with an economizer which is arranged at the convection section where the convection section tube bundle is arranged; the steam at an outlet of the radiation section is heated; and the other end of the economizer is connected with the separator. The high-dryness steam injection boiler has the beneficial effects that the economizer is additionally arranged for absorbing the heat of flue gas, so that the temperature of discharged smoke can be reduced, and the whole thermal efficiency is improved; and the steam which has 70% dryness and is discharged from the radiation section then enters the convection section to be heated, so that the dryness of the injected steam reaches up to 85%.
Description
Technical field:
The utility model relates to a kind of injection boiler, particularly a kind of high mass dryness fraction injection boiler.
Background technology:
Injection boiler is the single flow wet steam generator as the capital equipment of thickened oil recovery, because the steam of its generation is moist steam, the design mass dryness fraction is smaller or equal to 80%.Along with the continuous increase of thickened oil recovery difficulty, pressure rating has obtained continuous lifting, develops into 21MPa and 26MPa from 17.2MPa.Along with continuous advancement in technology, control section develops into the PLC computer control by relay.But annotating vapour quality leading indicator--on this index of mass dryness fraction, continue to use always, do not have breakthrough development less than 80%.
Traditional injection boiler structurally mainly contains water water-to-water heat exchanger, radiant section, convection section, changeover portion composition (see figure 1).Unboiled water is conducted to steam injection boiler body through water treating softener, through the oxygen-eliminating device deoxygenation by plunger displacement pump, makes water temperature exceed dew point through water-water-to-water heat exchanger heat exchange, again through after water-water-to-water heat exchanger entering radiant section heating, injects oil well behind the entering convection section draw heat.In actual motion; Because factors such as parameter adjustment, deashing is untimely, radiant section heat absorption intensity large outlet mass dryness fraction difficulty is controlled, assurance safe operation; Actual mass dryness fraction about 70%, exhaust gas temperature at 220-260 ℃ of operating thermal efficiencies below 80%; Cause unnecessary energy waste, also influenced the whole structure of thickened oil recovery.
Its main cause is: because main heat transfer type is radiation in the radiant section, radiation intensity is big, reaches 70% in outlet of steam boiler end steam quality simultaneously; Transmit calorific intensity Da Yi and cause the fluidised form in the boiler tube to change, thereby cause heat transfer deterioration, be prone to cause separating out of local salt to form dirt; Hinder and conduct heat; Cause hot-spot, form bulge, bring potential safety hazard to injection boiler.
The utility model content:
The purpose of the utility model is exactly the above-mentioned defective that exists to prior art, and a kind of high mass dryness fraction injection boiler is provided, and has improved the thermal efficiency, and the heat that absorbs is come heating steam, and steam quality is increased substantially.
Its technical scheme is: comprise burner, water-water-to-water heat exchanger, convection section tube bank, changeover portion, radiant section tube bank, separator and atomizing pipeline; Convection section tube bank and radiant section tube bank are located in the confined space, and an end of water-water-to-water heat exchanger is communicated with the convection section tube bank, and the other end is communicated with the radiant section tube bank; The back with water inlet line of convection section tube bank is through water-water-to-water heat exchanger; The water outlet pipeline injects oil well through water-water-to-water heat exchanger, radiant section tube bank and separator, and the water side of described radiant section tube bank connects economizer, and economizer is installed in the convection section at convection section tube bank place; The steam of heating radiant section outlet, the other end of economizer connects separator.
Above-mentioned economizer adopts the light pipe staggered arrangement to process.
The utility model compared with prior art, its beneficial effect is:
1, the economizer of setting up can absorb flue gas heat, reduces exhaust gas temperature, improves overall thermal efficient;
2, the 70% mass dryness fraction steam that radiant section is come out gets into the convection section heating again, makes that notes vapour mass dryness fraction can be up to 85%;
3, because the heat absorption of the steam of high mass dryness fraction is in convection section, to carry out, do not form fouling, heat-transfer effect is good, moves safer;
4, overall structure is not done big change, the unification of feasible operation and former injection boiler;
5, because exhaust gas temperature descends, make exhaust gas temperature reach national requirements.
Description of drawings:
Accompanying drawing 1 is the prior art constructions sketch map;
Accompanying drawing 2 is structural representations of the utility model;
Accompanying drawing 3 is side views of the economizer of the utility model;
Among the last figure: water treatment system 1, oxygen-eliminating device 2, plunger displacement pump 3, burner 4, water-water-to-water heat exchanger 5, convection section tube bank 6, changeover portion 7, radiant section tube bank 8, separator 9, atomizing pipeline 10, economizer 11.
The specific embodiment:
In conjunction with accompanying drawing 2-3, the utility model is done further to describe:
The utility model comprises burner 4, water-water-to-water heat exchanger 5, convection section tube bank 6, changeover portion 7, radiant section tube bank 8, separator 9 and atomizing pipeline 10; Convection section tube bank 6 is located in the confined space with radiant section tube bank 8; One end of water-water-to-water heat exchanger 5 is communicated with convection section tube bank 6, and the other end is communicated with radiant section tube bank 8, and the back with water inlet line of convection section tube bank 6 is through water-water-to-water heat exchanger 5; The water outlet pipeline injects oil well through water-water-to-water heat exchanger 5, radiant section tube bank 8 and separator 9; The water side of described radiant section tube bank 8 connects economizer 11, and economizer 11 is installed in the convection section at convection section tube bank 6 places, the steam of heating radiant section outlet; The other end of economizer 11 connects separator 9, and economizer 11 adopts the light pipe staggered arrangement to process.
Because the radiant section outlet steam temperature is up to 350 ℃, the problem of no local corrosion.The cigarette temperature is about 1000 ℃ here simultaneously, and heat-transfer effect is good, and is heat convection, is difficult for causing steam heat transfer deterioration in the boiler tube, forms salification.Can bring up to 90% after the steam heat absorption of 70% mass dryness fraction, and easy operating.
Wherein, the structure of economizer is following:
1. heat exchange area confirms
Two indexs of definite main consideration of heat exchange area, the one, heat absorption number, the 2nd, the flue gas resistance behind the increase economizer.
Confirming of heat absorption number: with pressure is that 17.2MPa is a design pressure, and the latent heat of vaporization of this moment is 841.16kj/kg, and bringing up to 85% by the actual motion mass dryness fraction by 70% increases by 15%, needs the heat 126.12kj/kg that absorb more.This moment, the steam heat enthalpy of 70% mass dryness fraction was 2287.21kj/kg.
Economizer is all used light pipe, and aligning method is stagger arrangement, and pipe is that 102mm, interlayer spacing are 88mm apart from level.1825 ℃ of import cigarette temperature, heat transfer coefficient are 232.59kj/mh ℃, according to the rated capacity that is designed by per hour calculating required heat exchange area, thereby confirm the quantity of economizer light pipe.
Average cigarette speed by above conceptual design is 13.76m/s, and the flue gas actual internal area is 0.825m
2, flue gas resistance can be controlled in 54.39Pa, former design flue gas resistance position 367.93Pa, and these two add up to 422.32Pa.Caning be controlled in burner requirement cigarette like this hinders less than 500Pa with interior operation.
2. water resistance is checked
The economizer tube line length is controlled in 60 meters, adds the resistance of 60 bend parts, and the pipe internal resistance is controlled at 4.18 * 10
4In the Pa.Compare with whole steam resistance 2.5MPa, insignificant, do not influence flowing of whole water-steam system.
The workflow of the utility model is: after unboiled water softens through water treatment system 1 at present; Get into oxygen-eliminating device 2 deoxygenations again; After getting into water-water-to-water heat exchangers 5 and be warming up to 110-121 ℃ by plunger displacement pump 3,, get into radiant section tube bank 8 vaporizations after getting into 5 heat exchange of water-water-to-water heat exchanger again through convection section tube bank 6 heating; The steam of 70% mass dryness fraction gets into the steam that economizer 11 is heated to 90% mass dryness fraction after being come out by radiant section tube bank 8, injects oil well.
Claims (2)
1. one kind high mass dryness fraction injection boiler; Comprise burner (4), water-water-to-water heat exchanger (5), convection section tube bank (6), changeover portion (7), radiant section tube bank (8), separator (9) and atomizing pipeline (10); Convection section tube bank (6) and radiant section tube bank (8) are located in the confined space; One end of water-water-to-water heat exchanger (5) is communicated with convection section tube bank (6); The other end is communicated with radiant section tube bank (8), and the back with water inlet line of convection section tube bank (6) is through water-water-to-water heat exchanger (5), and the water outlet pipeline injects oil well through water-water-to-water heat exchanger (5), radiant section tube bank (8) and separator (9); It is characterized in that: the water side of described radiant section tube bank (8) connects economizer (11); Economizer (11) is installed in the convection section at convection section tube bank (6) place, the steam of heating radiant section outlet, and the other end of economizer (11) connects separator (9).
2. high mass dryness fraction injection boiler according to claim 1 is characterized in that: described economizer (11) adopts the light pipe staggered arrangement to process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202553716U CN202216231U (en) | 2011-07-19 | 2011-07-19 | High-dryness steam injection boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202553716U CN202216231U (en) | 2011-07-19 | 2011-07-19 | High-dryness steam injection boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202216231U true CN202216231U (en) | 2012-05-09 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202553716U Expired - Fee Related CN202216231U (en) | 2011-07-19 | 2011-07-19 | High-dryness steam injection boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202216231U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230612A (en) * | 2011-07-19 | 2011-11-02 | 山东森普瑞石油装备有限公司 | High-dryness steam injection boiler and method |
| WO2014026515A1 (en) * | 2012-08-13 | 2014-02-20 | 胜利油田三力石油技术开发有限公司 | Method and apparatus for improving steam dryness of steam injection boiler |
| CN111795373A (en) * | 2020-06-21 | 2020-10-20 | 中国石油天然气集团有限公司 | High-dryness steam injection boiler system of ocean platform |
-
2011
- 2011-07-19 CN CN2011202553716U patent/CN202216231U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230612A (en) * | 2011-07-19 | 2011-11-02 | 山东森普瑞石油装备有限公司 | High-dryness steam injection boiler and method |
| WO2014026515A1 (en) * | 2012-08-13 | 2014-02-20 | 胜利油田三力石油技术开发有限公司 | Method and apparatus for improving steam dryness of steam injection boiler |
| US9650877B2 (en) | 2012-08-13 | 2017-05-16 | Shandong Huaxi Petroleum Technology, Co., Ltd | Method and apparatus for improving steam dryness of steam injection boiler |
| CN111795373A (en) * | 2020-06-21 | 2020-10-20 | 中国石油天然气集团有限公司 | High-dryness steam injection boiler system of ocean platform |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120509 Termination date: 20150719 |
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| EXPY | Termination of patent right or utility model |